1 #define _BSD_SOURCE
2 #include <sys/stat.h>
3 #include <string.h>
4 #include <fcntl.h>
5 #include <errno.h>
6 #include <stdint.h>
7 #include <sys/sysmacros.h>
8 #include "syscall.h"
9
10 struct statx {
11 uint32_t stx_mask;
12 uint32_t stx_blksize;
13 uint64_t stx_attributes;
14 uint32_t stx_nlink;
15 uint32_t stx_uid;
16 uint32_t stx_gid;
17 uint16_t stx_mode;
18 uint16_t pad1;
19 uint64_t stx_ino;
20 uint64_t stx_size;
21 uint64_t stx_blocks;
22 uint64_t stx_attributes_mask;
23 struct {
24 int64_t tv_sec;
25 uint32_t tv_nsec;
26 int32_t pad;
27 } stx_atime, stx_btime, stx_ctime, stx_mtime;
28 uint32_t stx_rdev_major;
29 uint32_t stx_rdev_minor;
30 uint32_t stx_dev_major;
31 uint32_t stx_dev_minor;
32 uint64_t spare[14];
33 };
34
fstatat_statx(int fd,const char * restrict path,struct stat * restrict st,int flag)35 static int fstatat_statx(int fd, const char *restrict path, struct stat *restrict st, int flag)
36 {
37 struct statx stx;
38
39 int ret = __syscall(SYS_statx, fd, path, flag, 0x7ff, &stx);
40 if (ret) return ret;
41
42 *st = (struct stat){
43 .st_dev = makedev(stx.stx_dev_major, stx.stx_dev_minor),
44 .st_ino = stx.stx_ino,
45 .st_mode = stx.stx_mode,
46 .st_nlink = stx.stx_nlink,
47 .st_uid = stx.stx_uid,
48 .st_gid = stx.stx_gid,
49 .st_rdev = makedev(stx.stx_rdev_major, stx.stx_rdev_minor),
50 .st_size = stx.stx_size,
51 .st_blksize = stx.stx_blksize,
52 .st_blocks = stx.stx_blocks,
53 .st_atim.tv_sec = stx.stx_atime.tv_sec,
54 .st_atim.tv_nsec = stx.stx_atime.tv_nsec,
55 .st_mtim.tv_sec = stx.stx_mtime.tv_sec,
56 .st_mtim.tv_nsec = stx.stx_mtime.tv_nsec,
57 .st_ctim.tv_sec = stx.stx_ctime.tv_sec,
58 .st_ctim.tv_nsec = stx.stx_ctime.tv_nsec,
59 #if _REDIR_TIME64
60 .__st_atim32.tv_sec = stx.stx_atime.tv_sec,
61 .__st_atim32.tv_nsec = stx.stx_atime.tv_nsec,
62 .__st_mtim32.tv_sec = stx.stx_mtime.tv_sec,
63 .__st_mtim32.tv_nsec = stx.stx_mtime.tv_nsec,
64 .__st_ctim32.tv_sec = stx.stx_ctime.tv_sec,
65 .__st_ctim32.tv_nsec = stx.stx_ctime.tv_nsec,
66 #endif
67 };
68 return 0;
69 }
70
71 #ifdef SYS_fstatat
72
73 #include "kstat.h"
74
fstatat_kstat(int fd,const char * restrict path,struct stat * restrict st,int flag)75 static int fstatat_kstat(int fd, const char *restrict path, struct stat *restrict st, int flag)
76 {
77 int ret;
78 struct kstat kst;
79
80 if (flag==AT_EMPTY_PATH && fd>=0 && !*path) {
81 ret = __syscall(SYS_fstat, fd, &kst);
82 if (ret==-EBADF && __syscall(SYS_fcntl, fd, F_GETFD)>=0) {
83 ret = __syscall(SYS_fstatat, fd, path, &kst, flag);
84 if (ret==-EINVAL) {
85 char buf[15+3*sizeof(int)];
86 __procfdname(buf, fd);
87 #ifdef SYS_stat
88 ret = __syscall(SYS_stat, buf, &kst);
89 #else
90 ret = __syscall(SYS_fstatat, AT_FDCWD, buf, &kst, 0);
91 #endif
92 }
93 }
94 }
95 #ifdef SYS_lstat
96 else if ((fd == AT_FDCWD || *path=='/') && flag==AT_SYMLINK_NOFOLLOW)
97 ret = __syscall(SYS_lstat, path, &kst);
98 #endif
99 #ifdef SYS_stat
100 else if ((fd == AT_FDCWD || *path=='/') && !flag)
101 ret = __syscall(SYS_stat, path, &kst);
102 #endif
103 else ret = __syscall(SYS_fstatat, fd, path, &kst, flag);
104
105 if (ret) return ret;
106
107 *st = (struct stat){
108 .st_dev = kst.st_dev,
109 .st_ino = kst.st_ino,
110 .st_mode = kst.st_mode,
111 .st_nlink = kst.st_nlink,
112 .st_uid = kst.st_uid,
113 .st_gid = kst.st_gid,
114 .st_rdev = kst.st_rdev,
115 .st_size = kst.st_size,
116 .st_blksize = kst.st_blksize,
117 .st_blocks = kst.st_blocks,
118 .st_atim.tv_sec = kst.st_atime_sec,
119 .st_atim.tv_nsec = kst.st_atime_nsec,
120 .st_mtim.tv_sec = kst.st_mtime_sec,
121 .st_mtim.tv_nsec = kst.st_mtime_nsec,
122 .st_ctim.tv_sec = kst.st_ctime_sec,
123 .st_ctim.tv_nsec = kst.st_ctime_nsec,
124 #if _REDIR_TIME64
125 .__st_atim32.tv_sec = kst.st_atime_sec,
126 .__st_atim32.tv_nsec = kst.st_atime_nsec,
127 .__st_mtim32.tv_sec = kst.st_mtime_sec,
128 .__st_mtim32.tv_nsec = kst.st_mtime_nsec,
129 .__st_ctim32.tv_sec = kst.st_ctime_sec,
130 .__st_ctim32.tv_nsec = kst.st_ctime_nsec,
131 #endif
132 };
133
134 return 0;
135 }
136 #endif
137
__fstatat(int fd,const char * restrict path,struct stat * restrict st,int flag)138 int __fstatat(int fd, const char *restrict path, struct stat *restrict st, int flag)
139 {
140 int ret;
141 #ifdef SYS_fstatat
142 if (sizeof((struct kstat){0}.st_atime_sec) < sizeof(time_t)) {
143 ret = fstatat_statx(fd, path, st, flag);
144 if (ret!=-ENOSYS) return __syscall_ret(ret);
145 }
146 ret = fstatat_kstat(fd, path, st, flag);
147 #else
148 ret = fstatat_statx(fd, path, st, flag);
149 #endif
150 return __syscall_ret(ret);
151 }
152
153 weak_alias(__fstatat, fstatat);
154
155 #if !_REDIR_TIME64
156 weak_alias(fstatat, fstatat64);
157 #endif
158